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Oxygen pipeline failure — FRCA Final MCQ

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HardEthics, Human Factors and Patient SafetyOxygen pipeline failureFRCA Final

During emergency laparotomy, the oxygen analyser alarms and the pipeline pressure falls. The ventilator continues cycling but the inspired oxygen concentration falls to 23%. The patient is paralysed and oxygen saturation is 94%. What is the most important next step?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: A — Switch to the oxygen cylinder supply and ventilate with a self-inflating bag if needed

A falling inspired oxygen concentration with pipeline pressure loss is an oxygen supply failure until proven otherwise. The immediate response is to switch to cylinder oxygen, use an alternative breathing system if needed, and summon help. Waiting for desaturation wastes the reserve time. The oxygen analyser is a critical monitor and should not be silenced without action.

Reference: Association of Anaesthetists monitoring standards; RCoA Quick Reference Handbook